Android Layout question?

I want to have navigation bar at the bottom of my screen. There will be 'Prev' button at rightest and a 'Next' button at leftest. And a textview on center.

I tried linear and relative layout but failed. When I put width="fill_parent" to text then left button dissappears.

Here the one I tried:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:id="@+id/rlayout"
              android:layout_height="fill_parent"
        >
               <!-- other content a listview etc.
               -->

        <LinearLayout  android:id="@+id/navigator"
                      android:orientation="horizontal"
                        android:layout_alignParentBottom="true"
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                >
        <Button android:id="@+id/prevbtn"
                android:background="@drawable/prev"  android:onClick="prevPage"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        <TextView
                android:id="@+id/pageText"
                android:text=""
                android:gravity="center_horizontal"
                android:layout_centerHorizontal="true"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
 开发者_如何学C               />
        <Button android:id="@+id/nextbtn"
                android:background="@drawable/next"
                android:onClick="nextPage"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>

---

The following code changes will work:

1. For the textview change 'fill_parent' to 'wrap_content for both height and width.

2. For the buttons and the textview add android:layout_weight="1".

<LinearLayout
    android:id="@+id/navigator"
    android:orientation="horizontal"
    android:layout_alignParentBottom="true"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <Button
        android:id="@+id/prevbtn"
        android:onClick="prevPage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:layout_weight="1"/>
    <TextView
        android:id="@+id/pageText"
        android:text=""
        android:gravity="center_horizontal"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1" />
    <Button
        android:id="@+id/nextbtn"
        android:onClick="nextPage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:layout_weight="1"/>
</LinearLayout>

---

Try alignParentLeft="true" and alignParentRight="true" on the two buttons.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:id="@+id/rlayout"
              android:layout_height="fill_parent"
        >
               <!-- other content a listview etc.
               -->

        <LinearLayout  android:id="@+id/navigator"
                      android:orientation="horizontal"
                        android:layout_alignParentBottom="true"
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                >
        <Button android:id="@+id/prevbtn"
                android:background="@drawable/prev"
                android:onClick="prevPage"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:alignParentLeft="true" />
        <TextView
                android:id="@+id/pageText"
                android:text=""
                android:gravity="center_horizontal"
                android:layout_centerHorizontal="true"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                />
        <Button android:id="@+id/nextbtn"
                android:background="@drawable/next"
                android:onClick="nextPage"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:alignParentRight="true" />
</LinearLayout>
</RelativeLayout>